/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */
package org.apache.dolphinscheduler.e2e.pages.project.workflow;

import org.apache.dolphinscheduler.e2e.pages.project.workflow.task.ShellTaskForm;
import org.apache.dolphinscheduler.e2e.pages.project.workflow.task.SubWorkflowTaskForm;

import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.apache.dolphinscheduler.e2e.pages.project.workflow.task.SwitchTaskForm;
import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.interactions.Actions;
import org.openqa.selenium.support.FindBy;
import org.openqa.selenium.support.PageFactory;

import com.google.common.io.Resources;

import lombok.Getter;
import lombok.SneakyThrows;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

@SuppressWarnings("UnstableApiUsage")
@Getter
public final class WorkflowForm {
  private WebDriver driver;
  private final WorkflowSaveDialog saveForm;
  private final WorkflowFormatDialog formatDialog;

  @FindBy(className = "graph-format")
  private WebElement formatBtn;

  @FindBy(className = "btn-save")
  private WebElement buttonSave;

  public WorkflowForm(WebDriver driver) {
    this.driver = driver;
    this.saveForm = new WorkflowSaveDialog(this);
    this.formatDialog = new WorkflowFormatDialog(this);

    PageFactory.initElements(driver, this);
  }

  @SneakyThrows
  @SuppressWarnings("unchecked")
  public <T> T addTask(TaskType type) {
    final WebElement task = driver.findElement(By.className("task-item-" + type.name()));
    final WebElement canvas = driver.findElement(By.className("dag-container"));

    final JavascriptExecutor js = (JavascriptExecutor) driver;
    final String dragAndDrop = String.join("\n",
        Resources.readLines(Resources.getResource("dragAndDrop.js"), StandardCharsets.UTF_8));
    js.executeScript(dragAndDrop, task, canvas);

    switch (type) {
      case SHELL:
        return (T) new ShellTaskForm(this);
      case SUB_PROCESS:
        return (T) new SubWorkflowTaskForm(this);
      case SWITCH:
        return (T) new SwitchTaskForm(this);
    }
    throw new UnsupportedOperationException("Unknown task type");
  }

  public WebElement getTask(String taskName) {
    List<WebElement> tasks = new WebDriverWait(driver, 10)
        .until(ExpectedConditions.visibilityOfAllElementsLocatedBy(By.cssSelector("svg > g > g[class^='x6-graph-svg-stage'] > g[data-shape^='dag-task']")));

    WebElement task = tasks.stream()
        .filter(t -> t.getText().contains(taskName))
        .findFirst()
        .orElseThrow(() -> new RuntimeException("No such task: " + taskName));

    Actions action = new Actions(driver);
    action.doubleClick(task).build().perform();

    return task;
  }

  public WorkflowSaveDialog submit() {
    buttonSave().click();

    return new WorkflowSaveDialog(this);
  }

  public WorkflowFormatDialog formatDAG() {
    formatBtn.click();

    return new WorkflowFormatDialog(this);
  }

  public enum TaskType {
    SHELL,
    SUB_PROCESS,
    SWITCH,
  }
}
